а) 2Cu + O2 = 2CuO
3CuO + 2Al = Al2O3 + 3Cu
б) Fe2O3 + 2Al = Al2O3 + 2Fe
2Fe + O2 = 2FeO
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а) 2Cu + O2 = 2CuO
3CuO + 2Al = Al2O3 + 3Cu
б) Fe2O3 + 2Al = Al2O3 + 2Fe
2Fe + O2 = 2FeO